diff --git a/src/StaticModel.cc b/src/StaticModel.cc
index 7f83c5b773511d5465088c4be55d7f10949f9294..a70c95157d26d15a661e18a73e1bd7aaf1f6d8c4 100644
--- a/src/StaticModel.cc
+++ b/src/StaticModel.cc
@@ -2125,7 +2125,7 @@ StaticModel::writeOutput(ostream &output, bool block) const
         }
       output << "block_structure_stat.block(" << b+1 << ").Simulation_Type = " << simulation_type << ";" << endl
              << "block_structure_stat.block(" << b+1 << ").endo_nbr = " << block_size << ";" << endl
-             << "block_structure_stat.block(" << b+1 << ").mfs = " << getBlockMfs(block) << ";" << endl
+             << "block_structure_stat.block(" << b+1 << ").mfs = " << getBlockMfs(b) << ";" << endl
              << "block_structure_stat.block(" << b+1 << ").equation = [" << tmp_s_eq.str() << "];" << endl
              << "block_structure_stat.block(" << b+1 << ").variable = [" << tmp_s.str() << "];" << endl;
     }